Now that climate change is beyond dispute, StarTalk All-Stars host Seth Shostak is joined by Ken Caldeira, climate scientist at the Carnegie Institution for Science, and co-host Eugene Mirman to talk about the impact on humans and social systems.

Planetary scientist Dr. David Grinspoon answers questions about the human impact on Earth during the Anthropocene Era. Now updated with 13 minutes of Dr. FunkySpoon and Chuck Nice discussing why we must evolve from Homo Sapiens into Terra Sapiens.